 Home > Chemicals Industry > Rubber Plastic News > The thin-wall injection molding market is so hot, are you still hesitating?

The thin-wall injection molding market is so hot, are you still hesitating?

 Last Update: 2022-08-23
 Source: Internet
 Author: User

Tags

design experiment example

plastic bottles recycled

Search more information of high quality chemicals, good prices and reliable suppliers, visit www.echemi.com

During the epidemic, fresh food, self-heating food, ready-to-eat food, and takeaway became popular choices for ordinary people.
During the epidemic, the number of online orders for Hema Xiansheng increased by 220% compared with the same period last year

"The packaging field is currently the most important application field of thin-wall injection molding

In order to deeply discuss thin-wall injection molding technology and market hotspots, as well as sustainable development, the Adsale CPRJ Online Plastic Packaging Live Week (June 30-July 3) will launch a special session on "thin-wall injection molding" on the first day.
The guest host of the day will join hands with well-known injection molding machine enterprises - Tairui Machinery, packaging products and mold processing enterprises - Berry Elite Group, famous beverage terminal brand - Wahaha Group and other corporate experts to discuss with you.
Answer questions

Thin-wall injection molding packaging products have many advantages, and there are also many difficulties in processing technology.
In order to promote industry exchanges, Professor Xie Pengcheng has sorted out the key points of thin-wall injection molding technology in advance

Material: High flow properties

Since the thickness of packaging thin-walled products is below 0.
6mm and the flow-length ratio is generally greater than 200, the thin-walled injection molding cycle is very short, and the product cools very quickly during the molding process.
The material is required to have very high fluidity to achieve rapid injection molding.
, fill

Injection molding machine: high pressure, fast and precise

In order to meet the requirements of rapid filling, the thin-wall injection molding machine is required to meet the following conditions:

The injection pressure should be high, above 200 MPa (generally, the pressure of the injection molding machine is below 200 MPa);

The injection speed should be fast, above 200mm/sec (general injection speed is 100-150mm/sec);

The clamping force is large, and the clamping force provided by the clamping mechanism on the projected area of the product per square inch is 5-8 tons (normally 3-5 tons);

The response speed is fast, the injection speed displayed at the K exhibition is up to 2200mm/sec, and the response time is 11 milliseconds;

Electro-hydraulic combined drive: The hydraulic drive is used to provide greater injection pressure and speed, and the electric mode drives the fast response and precise movement of the clamping mechanism

In addition, the clamping mechanism of the thin-wall injection molding machine also has higher requirements for movement accuracy and stability

Mould: high strength, impact resistance, high cooling performance, good exhaust

Since thin-wall injection molding is a high-pressure, high-speed injection molding process, the mold is required to:

The mold material is better than ordinary mold steel;

The mold structure should strengthen the support to improve the resistance to deformation;

In the design of the mold gating system, the gate is larger than the average;

In the thin-walled injection molding process, the hot runner is usually the main one;

The requirements for the cooling process of the mold are very high, and the metal with better thermal conductivity can be used as an insert in the cavity;

The exhaust system is more demanding than the general mold, and the exhaust effect should be improved

When demoulding, since thin-walled products are easily deformed or damaged during the ejection process, larger and more ejector pins than conventional molds are usually designed to ensure that the products are not damaged
.

The future: thinner, cheaper, faster

Professor Xie Pengcheng said that the industry has been able to realize the processing and forming of enough thin-walled products, and the pursuit of faster production efficiency, higher control accuracy, and better motion stability will be room for further improvement in the future
.

He said the industry has been climbing the peaks in existing areas to produce thinner products in less time
.
A typical example is thin-wall packaging combined with in-mold lamination to achieve higher production efficiency
.
For example, a company produces four labeled ice cream boxes with a weight of 3.
25 grams and a thickness of 0.
32 mm, and the shortest cycle is 1.
78 seconds
.

Professor Xie Pengcheng concluded that in the future, thin-wall injection molding will continue to break the limit in pursuit of thinner thickness, higher efficiency, higher precision and lower cost
.

This article is an English version of an article which is originally in the Chinese language on echemi.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to service@echemi.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.